Yaskawa V7 PROFIBUS-DP - Manual (Page 65)

Troubleshooting C-13
‹ Module Status Indicators
The following LEDs indicates the status of the V7 PROFIBUS-DP Option.
Table C.7 – Diagnostic LEDs
LED Color Indication/Function
PWR Green Lit when the +5V power to the electronics is OK.
Turned off if the +5V is below +4.5V (min)
Indicates the module status
OFF Communication Option CPU not running.
Solid Green: Initialization.
Flashing green: Normal operation.
Solid Red: Internal Communication Option error.
Flashing red: V7 error detected.
WD Red/Green
Other indication Unspecified, Communication Option error
‹ LED Diagnostics
The following table presents the faults displayed by the LEDs on the communication Option, their causes, and countermeasures.
Table C.8 – LED Diagnostics
LED Display
PWR COM ERR WD
Content Cause Counter measures
Power is not being supplied
from the drive.
• Check the main circuit wiring on the drive.
• Cycle drive power.
OFF OFF OFF OFF
Power
OFF
Power is not being supplied to
the option unit due to poor
option unit connection.
• Turn of the drive power.
• Check the option unit connection to the
drive.
• Cycle drive power.
Solid
Green
OFF
Solid
Red Solid
Red CPU
Error
Option unit CPU error.
• Cycle drive power.
• Replace option unit if fault persists.
Solid
Green
OFF
Solid
Red Flashing
Red Drive
Error
Error in Drive unit.
• Cycle drive power.
• Replace drive if fault persists.
Solid
Green
OFF
Flashing
Red Solid
Green Com
Error A fault has occurred rendering
communication impossible.
• Check whether the address set in the
PROFIBUS-DP Master differs from the
address of the option unit.
• Check that the master is functioning
properly.
• Check that the termination resistor is
correctly connected to the communication
line.
• Check whether the communication line is
correctly connected (disconnected or poor
connection).
• Check that the communication line is
separated from the main power line.
Solid
Green Solid
Green Flashing
Red Solid
Green Com
Error A fault has occurred rendering
communication impossible.
• Check whether the address is duplicated
with any other devices within the
PROFIBUS-DP network.
Solid
Green Solid
Green
OFF
Solid
Green CPU
Init
Option unit under initialization
• Wait until WD LED is flashing
Solid
Green Solid
Green
OFF
Flashing
Green
Normal
Normal communication
possible.